Pfft. Just because something is hard to do, doesn’t mean it is worth lots of money to do it. It’s all about value to the customer / employer - not your expectations of your standard of living. Supply /demand - it is a simple as that when it comes to income.
Do you understand the 10,000 hour Theory which is about 8 to 10 years. It takes 10,000 hours roughly to Master about anything. Compile that with the amount of money you spend on equipment or instruments or other gear the transportation that you need to get back and forth between cities or venues, and the fact that the great majority of musicians never recoup any amount of money that they put into their craft let alone the large chunks of time they have to devote to learning the instrument, not to mention performing pieces on the instrument.
Musicians might get paid handsomely after perhaps 20 years of not getting paid much at all. It’s the nature of the biz, and very very few make it. My uncle was a professional musician in a time when popular music in this country was in its Hayday for performing musicians. And that was in the 20s 30s and 40s into the war. In the fifties it was suddenly not that obtainable and that’s when he went into teaching and started up a Guitar Academy in San Leandro California which did fairly well actually, but it was hard hard work and lots of promotion and salesmanship to get students in. Luckily it coincided with a boom in electric guitars by Leo Fender and his Fender Guitar and Amplifier company. It was good timing and quite coincidental.